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The Sennheiser HD 400S is a closed-back, over-ear wired headphone with a detachable single-sided cable and a one-button in-line remote for calls and playback. It is light at 217 g, folds for storage, and its 18 Ω impedance means a phone or laptop drives it easily without an amp. The closed fit cuts ambient noise and the sound leans toward solid bass with clear mids. Against wireless rivals it trades Bluetooth and noise cancelling for a cable that never needs charging and a lower, simpler setup.
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Owners of the HD 400S generally describe a comfortable, lightweight headphone with strong bass and an easy-to-drive sound. Many like the folding build and detachable cable for the price. Complaints center on the single-button remote and the plastic feel.
The Sennheiser HD 400S are closed-back, over-ear headphones with dynamic sound and solid bass. The closed-back design and secure over-ear fit reduce ambient noise.
The headband folds for storage and travel, and the headphones weigh 217 g. The construction is durable.
The detachable single-sided cable has a one-button in-line remote. It plays and pauses music and answers calls. The cable ends in a 3.5 mm angled plug.
